Type-writer.



No. 777,892. PATENTED DEC. 20, 1904. W. R. FOX.

TYPE WRITER.

APPLIOATION FILED mm 25, 1904.

\Vitrpesses:

UNITED STATES Patented December 20, 1904.

PATENT ()EFICE.

WILLIAM R. FOX, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO THE FOX TYPEVVRITER (10., OF GRAND RAPIDS, MICHIGAN.

TYPE-WRITER.

SPECIFICATION forming part of Letters Patent NO. 777,892, dated December 20, 1904.

Application filed June 25, 1904. $erial No. 214,150.

To all whom, it may concern.-

Be it known that I, WILLIAM R. Fox, acitizen of the United States, residing in the city of Grand Rapids, county of Kent, State of Michigan, have invented certain new and useful Improvements in Type-W'riters, of which the following is a specification.

This invention relates to improvements in type-writing machines.

It relates particularly to improvements in platens therefor.

The main object of my invention is to provide in a type-writing machine an improved platen which may be quickly and easily adjusted so that the platen-roll may be freely adjusted independent of the line-spacing mechanism or so that the same may be adjusted by the line-spacing mechanism, as desired.

Further objects and objects relating to structural details will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described-in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is fully illustrated in the accompanying drawings, forming a part of this specification, in which Figure 1 is a detail longitudinal sectional view of a structure embodying the features of my invention, taken on a line corresponding to line 1 1 of Fig. 2, portions of the platenspindle being shown in full lines. Fig. 2 is a detail transverse sectional view taken on a line corresponding to line 2 2 of Fig. 1. Fig. 3 is a detail transverse sectional view taken on a line corresponding to line 3 3 of Fig. 1, the platen-cradle and the attached parts being omitted. Fig 4 is an edge elevation view of the friction-spring 0.

In the drawings the sectional views are taken looking in the direction of the little arrows at the ends of the section-lines, and similar letters of reference refer to similar parts throughout the several views.

Referring to the drawings, A A represent the end pieces of the platen-cradle, which may be of any suitable form desired. The platenroll B is provided with suitable heads BB, which are rigidly secured thereto. The platenspindle is made up of sections D D, which are suitably journaled and carried by the platencradle. The spindle-section D is provided with a longitudinal threaded hole (Z at its inner end adapted to receive the reduced threaded end d of the spindle-section D. The head B of the platen-roll is provided with an outwardly-projecting hub b. The platen-roll is secured to the spindle-section D by means of set-screws 0 through this hub Z). The hub B of the platen-roll is journaled on the inwardly-projecting hub C of the linespacing ratchet-wheel (J. The spindle-section D is journaled on the hub C and is shouldered to bear against an inwardly-projecting shoulder at the inner end of the hub C. The inner end of the spindle-section D engages the inner end of section D, so that by turning the spindle-sections in the proper directions the line-spacing ratchet-wheel C is clamped to the platen-roll or may be released therefrom,as desired,thus releasing the platenroll from its ratchet-wheel or securing it thereto. When the platen-roll is freed from the line-spacing ratchet-wheel, it is evident that the same may be adjusted to any position desired. The inner face of the linespacing ratchet-wheel U is substantially flat and is adapted to bear against the platen-roll head B.

To prevent too free a movement of the platen-roll and toenable its proper adjustment, I arrange a friction-spring 0 in a suitable groove on the inner face of the ratchetwheel C, so that it will bear against the platen-roll head B, and thus hold the spring under tension, inducing a light and constant friction. The spring 0 is in the form of a circle and is curved in its plane, as is indicated in Fig. 4. It merely rests in the annular recess in the ratchet-wheel C and owing to its being curved out of a true plane serves as a friction device between the roll-head B and the ratchetwheel C. In operation it is not compressed radially, but laterally. There is a friction-surface also between the hub 6 and the hub or boss 5 of the cradle, although of course the principle friction is at the point of contact of the spring. This allows the easy rotation and adjustment of the platenroll.

With the parts thus arranged the platenroll may be quickly released vfrom the linespacing ratchet-head and adjusted to bring the paper in any desired position for printing. The platen-roll may then be quickly clamped to the ratchet-wheel and the spacing done in the usual manner, or should the circumstances require the adjustment by means of the platenspindle may be continued.

My improved platen is very simple in structure, and it is also economical to produce and durable in use. I have illustrated and described the same in the form preferred by me on account of its simplicity in structure and economy of production. I am aware, however, that it is capable of considerable structural variation without departing from my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a type-writing machine, the combination of a platen-roll; a platen-spindle formed in sections suitably threaded together; a linespacing ratchet-wheel having a hub journaled on said spindle, with an inwardly-projecting shoulder adapted to be engaged and clamped by said spindle-sections; suitable heads for said platen-roll, one of which is secured to said spindle-section's and the other of which is journaled on the hub of said ratchet-wheel; an annular groove on the inner face of said ratchet-wheel; and a friction-spring arranged in said groove, for the purpose specified.

2. In a type-writing machine, the combination of a platen-roll; a platen-spindle formed in sections suitably threaded together; a linespacing ratchet-wheel having a hub journaled on said spindle with an inwardly-projecting shoulder adapted to be engaged and clamped by said spindle-sections; suitable heads for said platen-roll, one of which is secured to one of said spindle-sections and the other of which is journaled on the hub of said ratchet-wheel; and a friction-spring,for the purpose specified.

3. In a type-writing machine, the combination of a platen-roll; a platen-spindle formed in sections suitably threaded together; a linespacing ratchet-wheel having a hub journaled on said spindle with an inwardly-projecting shoulder adapted to be engaged and clamped by said spindle-sections; suitable heads for said platen-roll, one of which is secured to one of said spindle-sections and the other of which is journaled on the hub of said ratchet-Wheel, for the purpose specified.

4. In a type-writing machine, the combination of a'platen-roll; a line-spacing ratchetwheel; a platen-spindle formed in sections suitably threaded together, whereby they are adapted to clamp said ratchet-wheel; suitable heads for said platen-roll, one of which is secured to one of said spindle-sections; an annular groove on the inner face of saidratchetwheel; and a friction-spring arranged in said groove, for the'purpose specified.

5. In a type-writing machine, the combination of a platen-roll; a line-spacing ratchetwheel; a platen-spindle formed in sections suitably threaded together, whereby they are adapted to clamp said ratchet-wheel; suitable heads for said platen-roll, one of which is secured to one of said spindle-sections, for the purpose specified;

6. In a type-writing machine, the combination of a platen-roll; a line-spacing ratchetwheel; a platen-spindle formed in sections suitably threaded together, whereby they are adapted to clamp said ratchet-wheel; suitable heads for said platen-roll, one of which is secured to one of said spindle-sections; and. a suitable friction-spring for said platen-roll, for the purpose specified.

7. In a type-writing machine, the combination of a platen-roll; a line-spacing ratchetwheel; a platen-spindle formed in sections, to one of which said platen-roll is secured, suitably threaded together, whereby they are adapted to clamp said ratchet-Wheel, for the purpose specified.

8. In a type-writing machine, the combination of a platen-roll; a line-spacing ratchetwheel; and a platen-spindle formed in sections, to one of which said platen-roll is secured, means of joining said sections together to clamp said ratchet-wheel between them, for the purpose specified.

In witness whereof I have hereunto set my hand and seal in the presence of two witnesses.

WILLIAM R. FOX. [L. s]

WVitnesses:

CORA BARBER, ETTA MOOMBER. 

